Just a couple suggestions......based on my own recent rebuild of a 1960 235 in a 54 pickup. I used the 261 grind cam with dual C/W's and Fentons and am very pleased with the results. I planned the engine and drivetrain gearing for cruising at 2000 rpms at 70 mph (.72 T5 w/3.42 R&P).
Several things you might want to consider are a full dynamic balance of the rotating assembly (pricey, but worth every penny), having the block drilled for a full-flow filtering, the lower 2 bolts of the timing cover modified so you don't have to drop the pan to access the timing gears, and drilling the crank for a small block bolt so you can draw your H/B on easily and secure it. The modifications to the block set me back $60.00. The cost for a rotational balance can vary but I paid $250. which included a good set of rods to replace my mismatched set. I disagree with those who say a 6 cylinder doesn't warrant balancing.
This setup in a 235 is not going to turn your engine into a street racer but you will have one that is smooth through the power band, makes better oil pressure at both speed and idle, is responsive without hesitation, starts instantly and idles perfectly. In 3500 miles since my rebuild I haven't had a hiccup out of the engine and although much of my driving is at 70 mph+ I'm still averaging 18 mpg on 87 octane gas.
Of course, the call is yours....I'm just offering up some options that have worked for me.
Dave
